The MSDN site has a good overview of what WindowsVista will bring to mobile devices that is quite interesting. The Go Mobile page has an overview of the innovations being incorporated to make mobile devices work better for the end user. There is information covering Auxiliary Displays, power management, network location awareness, the new Synchronization Manager, and Ink Awareness on the Tablet PC.
Auxiliary Displays are those little screens to appear on the outside of closed notebook computers that provide access to information such as email and appointments without needing to open and start the computer.
The Ink Awareness API for Tablet PCs combines shape recognition, outline interpretation and analysis hints to convert handwritten slides to professional presentations. There is a good example of this on the site.
It is evident that Microsoft has put a lot of effort into making the mobile device experience much more productive and robust in WindowsVista and it should be quite a treat to see these innovations come to fruition.